Results 271 to 280 of about 32,658 (300)

Azobenzene Photoswitching without Ultraviolet Light

Journal of the American Chemical Society, 2011
Most azobenzene-based photoswitches use UV light for photoisomerization. This can limit their application in biological systems, where UV light can trigger unwanted responses, including cellular apoptosis. We have found that substitution of all four ortho positions with methoxy groups in an amidoazobenzene derivative leads to a substantial (~35 nm) red
Andrew A, Beharry, Oleg, Sadovski, G Andrew, Woolley   +2 more
openaire   +2 more sources

Laterally Mounted Azobenzenes on Platforms

The Journal of Organic Chemistry, 2015
Triazatriangulenium ions have previously been used as platforms to prepare self-assembled monolayers of functional molecules such as azobenzenes with vertical orientation and that are free-standing on gold surfaces. We have now prepared azobenzenes that are spanned between two posts which are attached on two platforms.
Melanie, Hammerich, Rainer, Herges
openaire   +2 more sources

Optically Tunable Field Effect Transistors with Conjugated Polymer Entailing Azobenzene Groups in the Side Chains

Advanced Functional Materials, 2019
Semiconducting conjugated polymers with photoswitching behavior are highly demanded for field‐effect transistors (FETs) with tunable electronic properties.
Jianwu Tian, Lulu Fu, Zitong Liu, Hua Geng, Yanan Sun, Gaobo Lin, Xisha Zhang, Guanxin Zhang, Deqing Zhang   +8 more
semanticscholar   +1 more source

Modeling of Azobenzene-Based Compounds

Physical Sciences Reviews, 2017
AbstractAzobenzene is by far the most studied photochromic molecule and its applications range from optical storage to bio-engineering. To exploit the great potential of azobenzene, one must achieve deep understanding of its photochemistry as single molecule in solution AS WELL AS in-chain moiety and pendent group in macromolecular structures. With the
Marturano V., Ambrogi V., Bandeira N. A. G., Tylkowski B., Giamberini M., Cerruti P.   +5 more
openaire   +4 more sources

Pyridyl-substituted azobenzene disperse dyes

Dyes and Pigments, 1992
Abstract N,N-Disubstituted aminoazobenzene dyes containing a 2-pyridyl substituent were prepared and used for the dyeing, as disperse dyes, of polyamide, polyester and cellulose acetate. The dyeings and the fastness tests gave very satisfactory results.
VISCARDI, Guido, SAVARINO, Piero, QUAGLIOTTO, Pierluigi, ALBERTI G., LOI A.   +4 more
openaire   +1 more source

Crystallization-Induced Emission of Azobenzene Derivatives.

Angewandte Chemie, 2019
Most azobenzene derivatives are utilized as well-defined photoresponsive materials, but their emission properties have not been of great interest as they are relatively poor. Here, we report crystallization-induced emission (CIE) based on the suppression
Mitsuaki Yamauchi, K. Yokoyama, N. Aratani, H. Yamada, Sadahiro Masuo   +4 more
semanticscholar   +1 more source

Theoretical Study of the Isomerization Mechanism of Azobenzene and Disubstituted Azobenzene Derivatives

The Journal of Physical Chemistry A, 2006
A series of azobenzenes was studied using ab initio methods to determine the substituent effects on the isomerization pathways. Energy barriers were determined from three-dimensional potential energy surfaces of the ground and electronically excited states. In the ground state (S(0)), the inversion pathway was found to be preferred.
Christina R, Crecca, Adrian E, Roitberg
openaire   +2 more sources

Athermal Azobenzene‐Based Nanoimprint Lithography

Advanced Materials, 2016
A novel nanoimprint lithography technique based on the photofluidization effect of azobenzene materials is presented. The tunable process allows for imprinting under ambient conditions without crosslinking reactions, so that shrinkage of the resist is avoided. Patterning of surfaces in the regime from micrometers down to 100 nm is demonstrated.
Christian, Probst, Christoph, Meichner, Klaus, Kreger, Lothar, Kador, Christian, Neuber, Hans-Werner, Schmidt   +5 more
openaire   +2 more sources

Azobenzene photoswitches in bulk materials

Physical Review E, 2008
A nonadiabatic two-scale quantum-classical dynamics method is developed to allow for dynamical simulation of photoinduced processes and reactions in chemically complex condensed-matter systems such as photosensitive liquid crystals. A first application to photoswitching of azobenzene in the bulk reveals not only valuable insights into the excited-state
Boeckmann, Marcus, Doltsinis, Nikos L., Marx, Dominik   +2 more
openaire   +2 more sources

Azobenzene-Linked Porphyrin−Fullerene Dyads

Journal of the American Chemical Society, 2007
A new group of porphyrin-fullerene dyads with an azobenzene linker was synthesized, and the photochemical and photophysical properties of these materials were investigated using steady-state and time-resolved spectroscopic methods. The electrochemical properties of these compounds were also studied in detail.
David I, Schuster, Ke, Li, Dirk M, Guldi, Amit, Palkar, Luis, Echegoyen, Christopher, Stanisky, R James, Cross, Marja, Niemi, Nikolai V, Tkachenko, Helge, Lemmetyinen   +9 more
openaire   +2 more sources